Valve for internal-combustion-engine cylinders.



P. W. MILBURN. VALVE FOR INTERNAL COMBUSTION ENGINE CYLINDERS.

APPLICATION FILED 0OT.11 1912.

INVENTOI? %VMA:W M f 222,19 \S Patented July 7, 19M

2 BHBETB-BHEET 1.

P. W. MILBURN. VALVE FOR INTERNAL COMBUSTION ENGINE CYLINDERS.

APPLIO ATION IILED O0T.11, 1912.

Patented July 7, 1914.

2 SHEETS-SHEET 2.

PAUL W. MILBURN, F SPOKANE, WASHINGTON.

VALVE FOR INTEBNAL-COMBUSTIOlh-ENGINE CYLINDERS.

Specification of Letters Patent.

Application filed October 11, 1912. Serial No. 725,236.

To all whom it may concern Be it known that 1, PAUL W'. Minions, a citizen of the United States, residing at Spokane, county of Spokane, and State of \Vashington, have invented now and useful Improvements in Valves for internal-Combustion-Engine Cylinders, f which the following is a specification.

This invention relates to valves for internal combustion engines of the four cycle type, and more particularly to positively driven valves of the rotary type.

It is the object of this invention to provide a valve which will operate to open and close a port. in the engine cylinder rapidly and noisclessl'y, and at the same time remain open long enough to permit of a tree passage of the combustible charge to, and the exhaust gases from said cylinder.

'In the drawings, Figure 1, is a longitudinal sectional view of the invention showing the arrangement of the valves and the means for driving the same. Fig. 2, is a transverse sectional view taken through the valve casing and showing the position otthe several parts just prior to the opening of the intake port and on the first or intake stroke of the cycle of the piston. Fig, 3, is a transverse sectional View taken through the valve casing and showing the position of the several parts at the time of closing of the intake port, and at a time when the piston is starting to return on the second or compression stroke of the cycle. Fig. 4-, 1s a transverse sectional view of the valve casinn and valve showing the port of the cylinder closed and at a time after the charge has been fired and the piston has started on the third or power stroke of the cycle, Fig. 5, is a transverse sectional view taken through the valve and easing showing the position of the several. parts at a time just prior to the opening of the cylinder port for the exhaust, of the burnt gases, and at a time when the piston is just starting the fourth or exhaust stroke of the cycle.

Referring more particularly to the drawings the numeral -1- designates the valve casing which is secured to the engine cyl1ndcr by means of bolts 01' the like which pass throi'igh the wings -2. The valve casing; ---1-is cylindrical in form and comprises two walls 3 and E ispaced to form a water jacket --5- for the circulation of water to cool the casing and interior workvmunicates by means 0 body portion of the sleeve -12-.

ing parts of the valve. This valve casing --lis closed at one extremity by means of a header or the like '6, secured in place by bolts or screws -7- shown in Fig. 1. This header section is also formed with spaced walls to provide a space 8 for the circulation of water, and has its free extremity open as shown in Fig. 1. The opposite extremity of the casing is provided with a curved passage 9 which serves as the exhaust passage from the interior of the valve. i

The inlet port -10- is located at the top of the casing, extending entirely across the casing, and passes through the same to the interior thereof. About midway of the casing is located the water inlet -11- which communicates with the chamber 5-- and supplies Water thereto for the purpose of cooling,

Rotatably mounted within the valve casing -1-, is a sleeve -12- which is tapered from one extremity to the other, and consists 01 two spaced walls '13 and -14l.-, the space -15- between said walls 13 and -'14 serving as a chamber for the circulation of water. The sleeve -19r-' is provided with two ports 1(3- and -17-, the port -16 of which is the inlet port. and the port -17- is the exhaust port. These ports are alternately brought into register with the port "-18" of the valve casing which all times in register with a port through the wallo'f the engine cylinder, which is not shown in the drawings herewith. The sleeve --l2- is rotated at one-half engine speed. and this together with the location oithe ports serves to bring the inlet port iG- of the sleeve 12 into register with the port ---18- oi the casing --1 almost immediately after the exhaust port ----17-- has passed out of register with the ort -'1S--- oi" the-casing 1-.

The sleeve -.12- has an integral spindle -19- which projects through the open extremity of the casing -1- afore mentioned, and is held in place by a suitable gland or the like -20. The spindle 19 is also provided with a passa e -21 which compassage -2Q- with the water chamber -5- of the casing -1. This passa e 2lis also in communication with the water chamber -15- of the he wa- Patented July 7, 1914.

latter port is at ter chamber 1'5- oft-the sleeve is alsoin communication with passage 23- leading to the water outlet on the under side of header -6. Suitably secured to the spindie -19 is agear -2t which is connected in any suitable means with the crank shaft of the engine and forms the means by which the sleeve is rotated. I

Rotating within the sleeve 12 is a member 25', whidh is tapered from'one extremity to the other, and which comprises a body portion 2t from which project on opposite sides wings 27- and 28. The member '25 serves to divide the interior of thesleeve -12 into an inlet chamber and an exhaust chamber, the wing --2T being located on the exhaust side of the member 25- and the wing 2 8, be-

' ing located on the inlet side of the member -25---. This member 25 is also provided with an inner chamber 29 for the circulation of water to cool the same. Extending from the member .25-'- is a spindle -30- which is freely revoluble within the afore mentioned spindle 19' of the sleeve l2. of the member 25 also extends throughout the spindle 30' and communicates with the water space 5- of the casing 1 by means of a passage 3l leading to the passage 2l of the stem 19. Extending from the opposite extremity of the member 25- is an outlet pipe 32- which empties directly into the exhaust passage 9 as shown in Fig. 1, and serves as the water outlet of member 25. Secured to the free extremity of the spindle 30 is a gear -50- which has a suitable driving connection with the crankshaft of the engine and is the means by which said inner Epassages 21- and through P sage '-2l to. the inner chamber 15 of the sleeve -12- y from whence it passes through the passage 23- to the water outlet on the under side of header -6; and through the passage --3l to the inner chamber -29 of the member 25 and thence out through the outlet pipe 32 into the exhaust pipe 9. It will thus be seen that a perfect flow of water is provided for through all parts of'the valve.

Having fully described my invention, I will now describe the operation thereof. The valve being in the position shown in Fig. 2, the inlet port -16- being about to register with the ort 18., and the piston in the engine cylinder about to descend on the first or intake stroke of the cycle; as the piston. descends, the sleeve moves in the clirection of the arrow, and opens the port -l8 oi the casing'to the inlet port -10- The inner chamber 29--' or compression stroke, the sleeve -12 has rotated to a point shown in Fig. 3, and the port -18 in the casing has been completely closed. In the meantime due to its increased rotation the member 25 has made 0116'.

half a revolution as will be seen fromFig. 3, completely closing inlet port 10. Upon further rotation of the sleeve -12 and upon the completion of the compression stroke of the piston, the sleeve assumes the positionshown in Fig. 4c, and it is in this position when the charge is fired and the piston starts down upon its working stroke. At this time the member 25- has made a complete revolution as will be seen in this figure. After the piston has reached the limit of the working stroke, and starts upon its return stroke, the exhaust port -17- of the sleeve 12 begins to register with the port -18 of the casing, and upon thereturn of the piston the burnt'gases are forced out through, the exhaust pipe 9-'' the member -25 having completed one- .said casing having a plurality of ports adapted to successively register with the port in the casing a rotating member within the sleeve dividing the sleeve into a phirality of compartments and meansfor continuously driving the sleeve and the dividing member.

2. A rotary valve comprisinga casing, a sleeve rotating therein, a longitudinally'disposed member dividingthe sleeve into a pinrality of compartments, and. means for continuously rotating said sleeve and dividing member. 3

3. A rotary valve comprising a casing, having a port therein, a sleeve rotating said casing havin a plurality of ports therein adapted to be brought into and. out of register with the port in the casing, a rotating member within the sleeve compris ing a longitudinally disposed. body portion having oppositely arran ed lateral wings on its longitudinal edgesadapted' to divide the sleeve into two compartments, and means for rotating said sleeve and member.

4;. A rotary valve comprisinga casing, a sleeve rotatable therein, an integral spindle on the sleeve and projecting through the casing, a gear on said spindle for rotating the sleeve, a longitudinally disposed member di lot partments and rotatable within the sleeve,

and the casing, and a spindles for rotatln an integral spindle on said dividing member extending through said spindle on the sleeve ear on each of said the sleeve and dividing member, respectively. 5. A rotary valve comprising a casing formed of spaced walls to form a water chamber, having a water inlet pipe, a sleeve rotatable in said casing formed of spaced walls to form a water chamber, the water chamber in the sleeve being connected with the Water chamber in the casing, and an outlet pipe connected with said casing.

6. A rotary valve comprising a casing formed of spaced wallsto form a Water chamber, a water inlet pipe therefor, a sleeve rotatable in said casing formed of spaced walls to form a water chamber, the water chamber in the sleeve being connected with the water chamber in the casing, a rotatable member within the sleeve having a water chamber therein connected with the water chamber in the casing and the sleeve, and an outlet pipe connected with said casing.

7. A rotary valve comprising a casing, a sleeve rotating in said casing at one half engine speed, a member rotating within said sleeve atfull engine speed and means for rotating the sleeve and the member within the sleeve.

8. A rotary valve comprising a cylindrical casing having a port therein, a tapered sleeve rotating in said casing having a pin rality of ports adapted to successively register with the port in the casing, a tapered rotating member within the sleeve dividing the sleeve into two compartments, and means for continuously driving the sleeve and dividing member.

9. A rotary valve comprising a casing, a detachable header at one end for closing same, and an exhaut passage at the opposite end, a sleeve ro atable in said casing, an integral spindle-on the sleeve and projecting through said. header, a gear on said spindle for rotating the sleeve, 21 longitudinally disposed member dividing the sleeve into a plurality of compartments and ro tatable within the sleeve, an integral spin- .dle onlsaid dividing member extending through said spindle on the sleeve and the header, and a gear on said latter spindle for rotating same independent of the sleeve.

PAUL W. MILBURN. Witnesses:

J. L. HITNEY, G. P. MULoAnY.

copies of this patent may-be obtained for the cents each, by addressing the Commissioner of Emerita .1

Washington, D. G. 

